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https://www.readbyqxmd.com/read/28922898/brewer-s-yeast-saccharomyces-cerevisiae-enhances-attraction-of-two-invasive-yellowjackets-hymenoptera-vespidae-to-dried-fruit-and-fruit-powder
#1
Tamara Babcock, Regine Gries, John Borden, Luis Palmero, Analía Mattiacci, Maité Masciocchi, Juan Corley, Gerhard Gries
The German yellowjacket, Vespula germanica F., and common yellowjacket, Vespula vulgaris L. (Hymenoptera: Vespidae), are pests of significant economic, environmental, and medical importance in many countries. There is a need for the development and improvement of attractive baits that can be deployed in traps to capture and kill these wasps in areas where they are a problem. Yellowjackets are known to feed on fermenting fruit, but this resource is seldom considered as a bait due to its ephemeral nature and its potential attractiveness to nontarget species...
September 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28922768/accerbatin-a-small-molecule-at-the-intersection-of-auxin-and-reactive-oxygen-species-homeostasis-with-herbicidal-properties
#2
Yuming Hu, Thomas Depaepe, Dajo Smet, Klara Hoyerova, Petr Klíma, Ann Cuypers, Sean Cutler, Dieter Buyst, Kris Morreel, Wout Boerjan, José Martins, Jan Petrášek, Filip Vandenbussche, Dominique Van Der Straeten
The volatile two-carbon hormone ethylene acts in concert with an array of signals to affect etiolated seedling development. From a chemical screen, we isolated a quinoline carboxamide designated ACCERBATIN (AEX) that exacerbates the 1-aminocyclopropane-1-carboxylic acid-induced triple response, typical for ethylene-treated seedlings in darkness. Phenotypic analyses revealed distinct AEX effects including inhibition of root hair development and shortening of the root meristem. Mutant analysis and reporter studies further suggested that AEX most probably acts in parallel to ethylene signaling...
July 10, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28922627/distribution-patterns-and-morphology-of-sensilla-on-the-antennae-of-plutella-xylostella-l-a-scanning-and-transmission-electron-microscopic-study
#3
Xi-Zhong Yan, Cai-Ping Deng, Jiao-Xin Xie, Lan-Jun Wu, Xue-Jun Sun, Chi Hao
The antennal morphology, types of antennal sensilla, fine structures and distributions of the sensilla in Plutella xylostella L. (Lepidoptera: Plutellidae) were studied by scanning (SEM) and transmission (TEM) electron microscopy. The antenna, scape, pedicel and flagellum were all longer in males than in females. A total of seventeen types of sensilla were identified on the antennae: trichodea (two subtypes), basiconica, coeloconica (three subtypes), Böhm's bristles (two subtypes), styloconica (two subtypes), squamiformia, auricillica, furcatea (three subtypes), cupuliform organs and terminal sensory pegs...
September 6, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28922624/quantification-of-voc-emissions-from-paint-spraying-on-a-construction-site-using-solid-phase-microextraction-devices
#4
Wen-Hsi Cheng, Hsiao-Lin Huang, Kang-Shin Chen, Yu-Jen Chang
The objective of this study was to measure the emission of, and personal exposure to workers, volatile organic compound (VOC) during paint spraying on a construction site. Needle trap samplers (NTSs), which are a green solid phase microextraction sampling technology, were used to obtain air samples at a large music exhibition center. The standard active sampling method using charcoal tubes and a personal air pump, Method 1501, was simultaneously utilized at the sampling sites to assess the workers' VOC exposures...
September 18, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28921257/energy-recovery-from-wastewater-treatment-plants-through-sludge-anaerobic-digestion-effect-of-low-organic-content-sludge
#5
Yuyao Zhang, Huan Li
During anaerobic digestion, low-organic-content sludge sometimes is used as feedstock, resulting in deteriorated digestion performance. The operational experience of conventional anaerobic digestion cannot be applied to this situation. To investigate the feature of low-organic-content sludge digestion and explain its intrinsic mechanism, batch experiments were conducted using designed feedstock having volatile solids (VS) contents that were 30-64% of total solids (TS). The results showed that the accumulative biogas yield declined proportionally from 173...
September 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28920987/mechanisms-of-distinct-activated-carbon-and-biochar-amendment-effects-on-petroleum-vapour-biofiltration-in-soil
#6
Khaled M Bushnaf, George Mangse, Paola Meynet, Russell J Davenport, Olaf A Cirpka, David Werner
We studied the effects of two percent by weight activated carbon versus biochar amendments in 93 cm long sand columns on the biofiltration of petroleum vapours released by a non-aqueous phase liquid (NAPL) source. Activated carbon greatly enhanced, whereas biochar slightly reduced, the biofiltration of volatile petroleum hydrocarbons (VPHs) over 430 days. Sorbent amendment benefitted the VPH biofiltration by retarding breakthrough during the biodegradation lag phase. Subsequently, sorbent amendment briefly reduced the mineralization of petroleum hydrocarbons by limiting their bioavailability...
September 18, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28920125/volatile-hrs-asymmetry-and-subloops-in-resistive-switching-oxides
#7
Camilla La Torre, Andreas Kindsmüller, Dirk J Wouters, Catherine E Graves, Gary A Gibson, John Paul Strachan, R Stanley Williams, Rainer Waser, Stephan Menzel
Current-voltage characteristics of oxide-based resistive switching memories often show a pronounced asymmetry with respect to the voltage polarity in the high resistive state (HRS), where the HRS after the RESET is more conducting than the one before the SET. Here, we report that most of this HRS asymmetry is a volatile effect as the HRS obtained from a read operation differs from the one taken from the switching cycle at identical polarity and voltages. Transitions between the relaxed and the volatile excited states can be achieved via voltage sweeps, which are named subloops...
September 18, 2017: Nanoscale
https://www.readbyqxmd.com/read/28919654/protecting-energy-intakes-against-income-shocks
#8
Stephanie von Hinke, George Leckie
Whether and how changes in economic circumstances or household income affect individuals' diet and nutritional intakes is of substantial interest for policy purposes. This paper exploits a period of substantial income volatility in Russia to examine the extent to which, as well as how individuals protect their energy intakes in the face of unanticipated shocks to household income. Using rich data from the Russia Longitudinal Monitoring Survey, our results suggest that households use substitution, disproportionally cutting back spending on non-foods to protect spending on foods, change the composition of the consumption basket, and increase the consumption of 'cheaper' calories...
September 2017: Journal of Economic Behavior & Organization
https://www.readbyqxmd.com/read/28919049/perioperative-outcomes-of-syndromic-paraganglioma-and-pheochromocytoma-resection-in-patients-with-von-hippel-lindau-disease-multiple-endocrine-neoplasia-type-2-or-neurofibromatosis-type-1
#9
James J Butz, Qi Yan, Travis J McKenzie, Toby N Weingarten, Alexandre N Cavalcante, Irina Bancos, William F Young, Darrell R Schroeder, David P Martin, Juraj Sprung
BACKGROUND: Pheochromocytoma and/or paraganglioma associated with neurofibromatosis type 1, multiple endocrine neoplasia type 2A, and von Hippel-Lindau disease have different catecholamine biochemical phenotypes. We examined perioperative outcomes of pheochromocytoma/paraganglioma resection in 3 syndromic forms. METHODS: Retrospective review of patients undergoing resection of syndromic pheochromocytoma/paraganglioma from 2000 through 2016. RESULTS: Eighty-one patients underwent pheochromocytoma/paraganglioma resection (multiple endocrine neoplasia type 2A, n = 36; neurofibromatosis type 1, n = 26; von Hippel-Lindau disease, n = 19)...
September 14, 2017: Surgery
https://www.readbyqxmd.com/read/28918622/emission-changes-dwarf-the-influence-of-feeding-habits-on-temporal-trends-of-per-and-polyfluoroalkyl-substances-in-two-arctic-top-predators
#10
Heli Routti, Jon Aars, Eva Fuglei, Linda Hanssen, Karen Lone, Anuschka Polder, Åshild Ø Pedersen, Sabrina Tartu, Jeffrey M Welker, Nigel G Yoccoz
We monitored concentrations of per- and polyfluoroalkyl substances (PFASs) in relation to climate-associated changes in feeding habits and food availability in polar bears (Ursus maritimus) and arctic foxes (Vulpes lagopus) (192 plasma and 113 liver samples, respectively) sampled from Svalbard, Norway, during 1997-2014. PFASs concentrations became greater with increasing dietary trophic level, as bears and foxes consumed more marine as opposed to terrestrial food, and as the availability of sea ice habitat increased...
September 18, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28918565/forward-genetic-screens-identify-a-role-for-the-mitochondrial-her2-in-e-2-hexenal-responsiveness
#11
Alessandra Scala, Rossana Mirabella, Joachim Goedhart, Michel de Vries, Michel A Haring, Robert C Schuurink
This work adds a new player, HER2, downstream of the perception of E-2-hexenal, a green leaf volatile, and shows that E-2-hexenal specifically changes the redox status of the mitochondria. It is widely accepted that plants produce and respond to green leaf volatiles (GLVs), but the molecular components involved in transducing their perception are largely unknown. The GLV E-2-hexenal inhibits root elongation in seedlings and, using this phenotype, we isolated E-2-hexenal response (her) Arabidopsis thaliana mutants...
September 16, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28918497/antennal-and-behavioral-responses-of-mythimna-separata-walker-to-three-plant-volatiles
#12
Kaimei Lihuang, Zhilin Zhang, Kilnam Kim, Qiuying Huang, Chaoliang Lei
The oriental armyworm, Mythimna separata, is distributed widely in eastern Asia and Australia. The response of M.separata to 27 compounds identified from plant volatiles was determined from electroantennography (EAG) and wind tunnel results, which allowed an evaluation of the possible plant volatile compounds. The highest EAG values of males were elicited by trans-2,cis-6-nonadienal, and virgin females by benzyl alcohol. The amplitude in EAG dose-response was in the range of 0.24 to 2.87 mV. In the wind tunnel bioassays, significantly more females showed behavioral responses to wilting leaves and headspace collection of Pterocarya stenoptera rather than control...
September 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28918319/determination-of-chlorogenic-acids-and-caffeine-in-homemade-brewed-coffee-prepared-under-various-conditions
#13
Jong-Sup Jeon, Han-Taek Kim, Il-Hyung Jeong, Se-Ra Hong, Moon-Seog Oh, Kwang-Hee Park, Jae-Han Shim, A M Abd El-Aty
Coffee, a complex mixture of more than 800 volatile compounds, is one of the most valuable commodity in the world, whereas caffeine and chlorogenic acids (CGAs) are the most common compounds. CGAs are mainly composed of caffeoylquinic acids (CQAs), dicaffeoylquinic acids (diCQAs), and feruloylquinic acids (FQAs). The major CGAs in coffee are neochlorogenic acid (3-CQA), cryptochlorogenic acid (4-CQA), and chlorogenic acid (5-CQA). Many studies have shown that it is possible to separate the isomers of FQAs by high-performance liquid chromatography (HPLC)...
August 31, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28918281/distribution-of-vocs-in-urban-and-rural-atmospheres-of-subtropical-india-temporal-variation-source-attribution-ratios-ofp-and-risk-assessment
#14
Amit Kumar, Deepak Singh, Krishan Kumar, Braj Bihari Singh, Vinod Kumar Jain
This paper reports the first study which comprises the seasonal, diurnal variability, source characterization, ozone forming potential and risk assessment of volatile organic compounds (VOCs) at three sites (two urban and one rural) in the National Capital Territory of Delhi, India. The study was performed during three seasons of the year 2013-14 and two different categories of VOCs (aromatics and halogenated) have been selected. The study used the sampling and analytical procedures of NIOSH methods. Results showed that the mean concentration of sum of VOCs (∑VOC) is significantly higher at urban sites (110...
September 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28918273/volatile-and-semivolatile-emissions-from-the-pyrolysis-of-almond-shell-loaded-with-heavy-metals
#15
M A Martín-Lara, N Ortuño, J A Conesa
Heavy metal-loaded almond shell was subjected to pyrolysis to understand the effect of the presence of different heavy metals on its thermal degradation. Pyrolysis behavior of native and metal-loaded samples was studied by thermogravimetric analysis. Similar shapes of thermogravimetric curves indicate that the presence of cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni) and lead (Pb) did not change the main degradation pathways of almond shell. However, the temperature at which the decomposition in each stage takes place at a higher rate and char yield was considerably modified by the presence of Cr and Ni...
September 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28918153/linseed-oil-and-dgat1-k232a-polymorphism-effects-on-methane-emission-energy-and-nitrogen-metabolism-lactation-performance-ruminal-fermentation-and-rumen-microbial-composition-of-holstein-friesian-cows
#16
S van Gastelen, M H P W Visker, J E Edwards, E C Antunes-Fernandes, K A Hettinga, S J J Alferink, W H Hendriks, H Bovenhuis, H Smidt, J Dijkstra
Complex interactions between rumen microbiota, cow genetics, and diet composition may exist. Therefore, the effect of linseed oil, DGAT1 K232A polymorphism (DGAT1), and the interaction between linseed oil and DGAT1 on CH4 and H2 emission, energy and N metabolism, lactation performance, ruminal fermentation, and rumen bacterial and archaeal composition was investigated. Twenty-four lactating Holstein-Friesian cows (i.e., 12 with DGAT1 KK genotype and 12 with DGAT1 AA genotype) were fed 2 diets in a crossover design: a control diet and a linseed oil diet (LSO) with a difference of 22 g/kg of dry matter (DM) in fat content between the 2 diets...
September 13, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28918137/reticulo-rumen-mass-epithelium-gene-expression-and-systemic-biomarkers-of-metabolism-and-inflammation-in-holstein-dairy-cows-fed-a-high-energy-diet
#17
J M Arroyo, A Hosseini, Z Zhou, A Alharthi, E Trevisi, J S Osorio, J J Loor
Feeding a higher-energy diet by increasing cereal grains at the expense of forage during the last 3 to 4 wk prepartum is a traditional approach to help the rumen "adapt" to the traditional diets fed at the onset of lactation. Increasing grain/concentrate in the diet changes ruminal fermentation and in sheep and goats elicits marked changes in mRNA expression of immune-related genes in ruminal epithelium. Whether such changes at the epithelial and systemic levels occur in dairy cows when the dietary energy content increases at a fixed level of concentrate is unknown...
September 13, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28918122/pre-harvest-uv-c-irradiation-triggers-vocs-accumulation-with-alteration-of-antioxidant-enzymes-and-phytohormones-in-strawberry-leaves
#18
Yanqun Xu, Zisheng Luo, Marie Thérèse Charles, Daniel Rolland, Dominique Roussel
Recent studies have highlighted the biological and physiological effects of pre-harvest ultraviolet (UV)-C treatment on growing plants. However, little is known about the involvement of volatile organic compounds (VOCs) and their response to this treatment. In this study, strawberry plants were exposed to three different doses of UV-C radiation for seven weeks (a low dose: 9.6kJm(-2); a medium dose: 15kJm(-2); and a high-dose: 29.4kJm(-2)). Changes in VOC profiles were investigated and an attempt was made to identify factors that may be involved in the regulation of these alterations...
September 8, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28917808/single-drop-gold-nanoparticles-for-headspace-microextraction-and-colorimetric-assay-of-mercury-ii-in-environmental-waters
#19
Tesfaye Tolessa, Zhi-Qiang Tan, Yong-Guang Yin, Jing-Fu Liu
A novel headspace colorimetric nanosensor strategy for specific detection of Hg(II) was developed based upon analyte induced etching and amalgamation of gold nanoparticles (AuNPs). The Hg(II) was first selectively reduced to its volatile form, Hg(0), by stannous chloride (SnCl2) through chemical cold vapor generation (CVG) reaction. Then, the Hg(0) was headspace extracted into 37μL thioglycolic acid functionalized AuNP aqueous suspension containing 10% methanol as extractant and simultaneously reacted with AuNPs through the strong metallophilic Hg-Au interaction, resulting in a red-to-blue color change...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28917787/gas-chromatographic-mass-spectrometric-analysis-of-urinary-volatile-organic-metabolites-optimization-of-the-hs-spme-procedure-and-sample-storage-conditions
#20
Tanja Živković Semren, Irena Brčić Karačonji, Toni Safner, Nataša Brajenović, Blanka Tariba Lovaković, Alica Pizent
Non-targeted metabolomics research of human volatile urinary metabolome can be used to identify potential biomarkers associated with the changes in metabolism related to various health disorders. To ensure reliable analysis of urinary volatile organic metabolites (VOMs) by gas chromatography-mass spectrometry (GC-MS), parameters affecting the headspace-solid phase microextraction (HS-SPME) procedure have been evaluated and optimized. The influence of incubation and extraction temperatures and times, coating fibre material and salt addition on SPME efficiency was investigated by multivariate optimization methods using reduced factorial and Doehlert matrix designs...
January 1, 2018: Talanta
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